I have a similar issue and points 2 & 3 above don’t resolve. Turning off plugins and opening wp-admin in incognito mode don’t resolve anything. I can’t disconnected GA and I can’t reset Site Kit (I click ‘Reset’ and, the dashboard reloads, and all the same broken connections are still there). I’ve tried removing Site Kit completely (uninstall), but reinstalling the plugin shows the same settings. Is there any way to nuke the settings on uninstall?